To both 68nova , neil.
First off You really need to think about some head work. The head it self in stock trim will only flow in an about the 170s cfm. Mainly due to the Boss and ruff casting edges and Unsmooth Ports. How ever removing the Boss will bring you into the 180s. But removing the Boss and Installing a set of Lumps will then bring you into the 200 plus range. I'm only giving Ruff figures Reason being. (What valves are used How the head was ported and to what degree) also Numbers can varie from one location to another even some machines All things play apart in how the CFMs are read off a head If the head has a intake on it Or with out( or a small runner to act as a intake which helps direct the air into the head itself)
But The main point being is If you don't do something with the head Meaning even the very Least Clean Up the Ports to help improve the air flow. It won't really matter what cam , intake & carb you throw at it You may not be happy with what Your trying to do. So even if you leave the head stock and are just getting it freashened up At the very Least clean up the ports and get a Good valve job done (3 angle) Any gain over stock Is always Good, And always do the best you can To match everything To what you're wanting to do.
ex. tranny ,gearing , Intake & carb , cam and so on. Think it out twice Build it once and you'll find that You'll be much happier in the long run.
Ps what numbers i posted are somewhat higher But Was to just give a ball park Idea FYI and so that You have some clue as to why the Head realy needs the attention.
God doesn't like ugly.
